<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>苹果背景灯</title>
  <link rel="stylesheet" href="//at.alicdn.com/t/font_2331004_xlc3mxj1zgt.css">
  <style>
    body {
      margin:0;
      padding:0;
      display: flex;
      justify-content: center;
      align-items: center;
      width: 100vw;
      height: 100vh;
      background: #000;
    }
    .logo {
      font-size: 72px;
      color: #fff;
      text-shadow: 0 0 50px #0f0,
                   0 0 100px #0f0,
                   0 0 150px #0f0,
                   0 0 200px #0f0,
                   0 0 250px #0f0;
      animation: animate 6s linear infinite;
    }
    @keyframes animate {
      /* from {
        filter: hue-rotate(0deg);
      } */
      to {
        filter: hue-rotate(360deg);
      }
    }
  </style>
</head>
<body>
  <div class="iconfont icon-apple logo">

  </div>
</body>
</html>